Serial Cables Cable Adapters Cabling your serial devices to a Digi product is now easier than ever with our new cable adapters. While many custom cabling solutions can leave you with a cable that is either too long or too short for your application, the Digi cable adapters are used with commercially available CAT 5 cable of any length. Simply plug standard CAT 5 cable into your Digi product, connect a cable adapter to the other end and plug the adapter into your device. Cables Whether your serial device has an RJ-45 port, DB-9 or DB-25, Digi has a cable to complete the connection. These one-piece cabling solutions are available in 2’, 4’ or 6’ lengths as shown.